What he said.
You mentioned starting in full fine, there are a few reasons for this. It is the preferred setting for take-off as it is the 'low-speed' setting, so you don't need to change the prop setting between startup and take off (other than for the runup). It also (on a generic piston single) means lower drag for the starter motor to work against during the starting cycle.
There you go, more confusing prop facts
